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Re: 2.6.11-rc2 TCP ignores PMTU ICMP (Re: Linux 2.6.11-rc2)

To: Patrick McHardy <kaber@xxxxxxxxx>
Subject: Re: 2.6.11-rc2 TCP ignores PMTU ICMP (Re: Linux 2.6.11-rc2)
From: Bill Davidsen <davidsen@xxxxxxx>
Date: Mon, 31 Jan 2005 17:13:36 -0500
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>, David Brownell <david-b@xxxxxxxxxxx>, jf-ml-k1-1087813225@xxxxxxxxxxxxxxxxxxxxxx, david+challenge-response@xxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, ahaas@xxxxxxxxxxx
In-reply-to: <41F99656.5040304@xxxxxxxxx>
References: <20050127154150.360f95e2.davem@xxxxxxxxxxxxx><20050127154150.360f95e2.davem@xxxxxxxxxxxxx> <41F99656.5040304@xxxxxxxxx>
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Patrick McHardy wrote:
David S. Miller wrote:

I've forwarded this to netfilter-devel for inspection.
Thanks for collecting all the data points so well.

Here is the fix for everyone. Please report back if it doesn't
solve the problem. Thanks.

Worked here.


===== net/ipv4/netfilter/ip_nat_proto_tcp.c 1.10 vs edited =====
--- 1.10/net/ipv4/netfilter/ip_nat_proto_tcp.c  2005-01-17 23:00:55 +01:00
+++ edited/net/ipv4/netfilter/ip_nat_proto_tcp.c        2005-01-28 02:13:06 
@@ -105,7 +105,7 @@
                return 0;
iph = (struct iphdr *)((*pskb)->data + iphdroff);
-       hdr = (struct tcphdr *)((*pskb)->data + iph->ihl*4);
+       hdr = (struct tcphdr *)((*pskb)->data + hdroff);
if (maniptype == IP_NAT_MANIP_SRC) {
                /* Get rid of src ip and src pt */

   -bill davidsen (davidsen@xxxxxxx)
"The secret to procrastination is to put things off until the
 last possible moment - but no longer"  -me

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